Đáp án:
$\begin{array}{l}
1)2ab.\dfrac{4}{3}{a^2}{b^4}.7abc\\
= \dfrac{{56}}{3}{a^4}{b^5}c\\
2){a^3}{b^3}.{a^2}{b^2}c = {a^5}{b^5}c\\
3)\dfrac{2}{3}{a^5}b\left( { - \dfrac{1}{2}ab} \right){a^2}b\\
= \dfrac{{ - 1}}{3}{a^8}.{b^3}\\
4) - 2\dfrac{1}{3}{a^3}{c^2}.\dfrac{1}{7}a{c^2}6abc\\
= \dfrac{{ - 7}}{3}.\dfrac{1}{7}.6.{a^5}.b.{c^5}\\
= - 2{a^5}b{c^5}\\
5)\left( { - 1,5a{b^2}} \right).\dfrac{1}{4}bc{a^2}b\\
= \dfrac{{ - 3}}{2}.\dfrac{1}{4}.{a^3}.{b^4}.c\\
6)3abxy\left( { - \dfrac{1}{5}a{x^2}yz} \right).\left( { - 3ab{x^3}y{z^3}} \right)\\
= 3.\left( { - \dfrac{1}{5}} \right).\left( { - 3} \right).{a^3}{b^2}.{x^6}{y^3}{z^4}\\
7){p^2}q{q^3}{p^4}.\dfrac{1}{{{2^2}}}.{\left( {pq} \right)^2}.{\left( {4{p^2}q} \right)^2}\\
= \dfrac{1}{4}{p^6}{q^4}.{p^2}{q^2}.16{p^4}{q^2}\\
= 4{p^{12}}.{q^8}\\
8)3a{k^2}\left( { - 2k{x^3}} \right){k^3}\\
= - 6a{k^6}{x^3}\\
9)2y3{y^2}d{y^3}{d^2}{y^2}\\
= 6{d^3}.{y^8}\\
10){\left( {2{x^2}} \right)^2}.\left( { - 3{y^5}} \right).{\left( { - 5xz} \right)^3}\\
= 4{x^4}.\left( { - 3} \right){y^5}.\left( { - 125} \right){x^3}{z^3}\\
= 1500.{x^7}{y^5}{z^3}
\end{array}$
